The Qlik Engine API is a WebSocket protocol that uses JSON to pass information between the Qlik Sense Engine and the clients. To explain this sentence a bit further, a WebSocket is a both-ways communication protocol that allows the Qlik Engine API to communicate with the web browser of a user. The communication is both ways (full-duplex), which means that the user can, for example, pass a selection to the Qlik Engine API but also the Qlik Sense Engine can push updated data to the user's browser, without the user having to accept or do anything.
The format in which the WebSocket communicates is JSON, which stands for JavaScript Object Notation. It's a data structure in a string format following a specific syntax using brackets, colons, and double quotes, which can easily be interpreted by JavaScript. JSON is characterized and defined using the following set...
